HomeCollaborations
Alternating gradient focusing
We are continuing benchmark experiments on the focusing and selection of large molecules in our old group at the Fritz-Haber-Institut in Berlin and we are generally collaborating on the manipulation of large molecules with the Department of Molecular Physics (Gerard Meijer) at the Fritz Haber Institute.Laser alignment and orientation
We are investigating the alignment and orientation of large, state selected molecular samples in collaboration with the group of Henrik Stapelfeldt at the University of Aarhus, Denmark. In this collaboration we have successfully coupled the state selection, due to the dc Stark effect, and rotational alignment and orientation, due to the ac Stark effect, in order to obtain unprecedented degrees of alignment and mixed-field orientation. We are now further exploiting these produced samples for molecular frame photoelectron angular distribution measurements.Theoretical support on the photoelectron angular distributions is provided by the group of Lars Bojer Madsen (Aarhus). The description of laser alignment and mixed field orientation is developed together with the group of Rosario González-Férez (Granada).
X-FEL investigations of gas-phase molecules
Our projects on the diffractive imaging and photoelectron investigations of controlled gas-phase molecules are performed in collaboration with the Coherent Imaging Division (Henry Chapman), the Max-Planck Advanced Study Group at CFEL, the groups of Henrik Stapelfeldt (Aarhus University), Arnaud Rouzee and Marc Vrakking (Max-Born-Institute Berlin), and many other colleagues around the world.Alternating gradient deceleration
Experiments on the focusing and deceleration of large molecules using the Alternating Gradient principle are performed together with the Department of Molecular Physics at the Fritz-Haber-Institute of the Max-Planck-Society in Berlin. The project Alternate Gradient focusing of large (bio-)molecules was part of the priority program 1116 Interactions in ultracold atomic and molecular gases of the German Research Foundation (DFG). Prototype experiments on the Alternate Gradient focusing of metastable CO and YbF were also performed by Rick Bethlem (Free University Amsterdam, The Netherlands) and the group of Mike Tarbutt and Ed Hinds (Imperial College, London, UK).High-resolution UV spectroscopy
Investigations of molecular dynamics are performed together with the groups of Michael Schmitt (University of Düsseldorf) and David W. Pratt (University of Pittsburgh) and Leo Meerts (Radboud University, Nijmegen, The Netherlands). Molecular constants, i. e., rotational constants and dipole moments of some molecules of interest to our work have been accurately measured in collaboration with Jens-Uwe Grabow at the University of Hannover.
